DISO Converter Group Control for Uniform Voltage and Peak Power Tracking
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Solution Overview
Problem
Current power tracking systems for Distributed-Input Series-Output (DISO) converters lack efficient maximum power tracking and uniform voltage distribution, leading to suboptimal power utilization and increased complexity with multiple independent maximum power tracking (MPT) controllers, which result in higher costs and system instability.
Innovation Solution
A unified maximum power tracking (MPT) controller combined with Uniform Time Division (UTD) and Uniform Voltage Distribution (UVD) control is used to actively manage peak power voltages across groups of DISO converters, enabling one converter to update peak power while others hold recent values, and ensuring equalized input voltages within each group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple independent maximum power tracking (MPT) controllers are used for different groups of DISO converters, then each group can independently track maximum power, but system complexity increases and stability decreases
Solution Approach 1:
The patent combines multiple independent MPT controllers into a single unified MPT controller that manages multiple groups of DISO converters. This unified controller integrates the maximum power tracking functionality for all converter groups, reducing the overall number of controllers while maintaining the ability to track maximum power across different groups. The controller achieves this by coordinating voltage distribution and power tracking signals across all converter groups through a centralized control architecture.
2Productivity
If multiple independent MPT controllers are used, then each converter group can autonomously track power, but system stability deteriorates
Solution Approach 1:
The unified MPT controller implements a feedback mechanism that monitors the operating status of all DISO converter groups and adjusts voltage distribution commands accordingly. The controller receives feedback signals from each converter group regarding their power output and voltage levels, then dynamically coordinates the maximum power tracking process across all groups. This feedback loop ensures synchronized operation and maintains system stability by preventing conflicting control actions that would arise from independent controllers.
3Stability of the object's composition
If uniform voltage distribution control is implemented across all DISO converters simultaneously, then voltage balance is achieved, but power tracking efficiency decreases due to interference
Solution Approach 1:
The patent segments the control of voltage distribution across DISO converter groups by implementing time-division multiplexing. The unified MPT controller sequentially activates different converter groups for maximum power tracking at different time intervals, rather than simultaneously controlling all groups. This segmentation in time domain allows each group to track maximum power without interference from voltage distribution control applied to other groups, while still achieving uniform voltage distribution across all groups over the complete cycle.
Data Source
AI summary
An apparatus may include a group of distributed-input series-output (DISO) converters, each of which are actively controlled by a common maximum power tracking (MPT) controller. The common MPT controller is configured to actively control one of the DISO converters in the group of DISO converters to update a present group-peak power voltage of the one DISO converters while remaining DISO converters in the group of DISO converters are controlled to hold most recently grouped peak power voltages updated during their previously non-overlapping uniform time windows of active MPT control.